Improve Your Chess: First Learn End! - Illa-Capablanca 1911

After Capablanca easily equalizes in the opening, he slowly outplays his opponent to get a winning knight endgame. However, he does not play it in the most accurate manner and with an inaccurate 44th move, allows White drawing chances. Another inaccuracy on move 48 leaves the position fully equal. However, there was still play for both sides and White faced a critical but difficult decision on move 52. Unfortunately for Illa, he chose wrong and Capablanca wrapped up the win with good (although unnecessarily cautious) technique.